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WorksheetsChemical Spot Tests & Staining Methods
Total questions: 15
Worksheet time: 8mins
What is the chemical name of AlO(OH)?
hydroxide oxido aluminum
aluminum hydroxide
aluminum oxyhydroxide
Which rock/mineral does NOT contain calcium?
gypsum
bauxite
apatite
What color is produced in spot test analysis of chromium?
White
Purple/pink
Blue
Which elements may be present in the same solution?
Co and Fe
Cr and Fe
Cu and Fe
Which element has 390 ppm abundance in the Earth's crust?
Barium
Gold
Cobalt
In the test for presence of Mn, sodium bismuthate is added to the sample solution in ____.
powder form
20% solution
both
The most common form of phosphate rock is ____.
brucite
apatite
none of the above
Formation of brown and blue colors indicates presence of ____.
copper
iron
iron and copper
The test applicable for sample containing high value of molybdenum uses _____.
nitric acid
hydrochloric acid
sulfuric acid
Carbonate minerals are present in which type of rocks?
sedimentary rocks
igneous rocks
metamorphic rocks
all of the above
Calcite group is a/an ____.
orthorhombic system
hexagonal-rhombohedral system
Which of the following is used to stain carbonate minerals?
sodium cobaltinitrite
Alizarin Red S
After staining with Alizarin Red S dye, the carbonate mineral ______ remains unstained.
calcite
dolomite
Feldspars with Na and Ca as major elements are called _____.
Potassium Feldspar
Plagioclase feldspar
Alkali feldspar
This mineral stains lemon/bright yellow with HF and sodium cobaltinitrite.
Plagioclase Feldspar
K-feldspar
Quartz
